If you're someone who does a lot of work on the road, and needs to reference PDF source material, you'll find that QuickSearch PDF (US$4.99) from Olive Toast Software is the tool you didn't realize ...

Free PDF viewer with unique UI in terms of flat design and original layout. Annotate PDF with a complete set of tools, manage PDF files, connect to cloud services and even protect PDF with signature.

Free PDF viewer with unique UI in terms of flat design and original layout. Annotate PDF with a complete set of tools, manage PDF files, connect to cloud services and even protect PDF with signature.

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The software Google's browser uses to show PDF files has been proprietary for years, but now it's an open-source project called PDFium that others can scrutinize or use themselves. Stephen Shankland ...

The following content is brought to you by Mashable partners. If you buy a product featured here, we may earn an affiliate commission or other compensation. Edit digital files in a jiffy. Credit: PDF ...